What Is a Coloboma? - American Academy of Ophthalmology
2024年9月10日 · In this coloboma, part of the retina is missing. The symptoms of a coloboma depend on where it occurs. A coloboma of the iris will be visibly noticeable due to the keyhole or cat-eye appearance of the pupil. An eyelid coloboma will also be noticeable due to a notch or defect in the eyelid.
Coloboma - EyeWiki
Coloboma is derived from the Greek koloboma, meaning mutilated, curtailed, or with defect. The term is used to describe ocular defects of the eyelids, iris, lens, ciliary body, zonules, choroid, retina or optic nerve. It is typically located in the inferonasal quadrant of the involved structure and is often associated with microphthalmia.
Coloboma - National Eye Institute
2024年11月27日 · Different types of coloboma can affect different parts of the eye, including the: Iris (colored part of the eye) Uvea (layer of the eye that contains the iris) Lens (clear inner part of the eye that helps the eye focus) Retina (light-sensitive tissue lining the back of the eye) Macula (part of the retina needed for central vision
What Is a Coloboma? Types, Symptoms, and Treatments - WebMD
2024年9月12日 · There are six different types of colobomas: Chorioretinal colobomas occur when part of the retina is missing. The retina is the layer of cells lining the back of the eye that senses light and...
Ocular coloboma—a comprehensive review for the clinician
Prophylactic laser retinopexy to the border of choroidal coloboma appears to be an attractive option for reducing risk of coloboma-related retinal detachment. However, a majority of the eyes have the optic disc within the choroidal coloboma, thus making it difficult to safely administer a complete treatment.
Types of Coloboma - National Eye Institute
2021年12月21日 · Uveal coloboma can affect 2 different parts of the eye: the iris and the retina. When uveal coloboma affects the iris, it’s called iris coloboma. The iris is the colored part of your eye that surrounds your pupil — the opening in the middle of your eye where light enters the eye.
2013年2月22日 · Macular coloboma may be caused when normal eye development is interrupted or following an inflammation of the retina during development of the baby. An abnormal optic nerve that is deeply “excavated” or hollowed out. In some cases it …
Coloboma | Information and useful contacts - RNIB
At the back of your eye, the retina (the light-sensitive layer) and the choroid (the layer of tissue and blood vessels behind the retina) can be affected by coloboma. This is known as a chorioretinal coloboma.
Peering into the depths: chorio-retinal coloboma and risk of retinal ...
Coloboma, a rare developmental anomaly resulting from incomplete embryonic fissure closure, can involve both the anterior segment (iris and ciliary body) and posterior segment (choroid, retina and optic disc) of the eye.1 2 The most common type of posterior segment coloboma is chorio-retinal coloboma, typically located in the inferonasal quadrant. . Another type is optic disc coloboma, which ...
Light enters our eyes by passing through our cornea, our pupil, (the hole in the middle of the iris), and our lens so that it is sharply focused onto the retina lining the back of our eye. The retina is made up of light sensitive cells that convert light into electrical impulses which then travel along the optic nerve to our brain.